Stretchable Organic Semiconductor Polymer With Stable Charge Mobility

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Solution Overview

Problem

Existing materials for stretchable electronic devices lack the balance between electrical properties and stretchability, leading to performance degradation under external movements.

Innovation Solution

Development of a polymer with a specific structural unit represented by Chemical Formula 1, which includes electron accepting and donating moieties, enhancing planarity and crystallinity for high charge mobility while maintaining stretchability through a copolymer structure.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If existing materials are used for stretchable electronic devices, then device flexibility is improved, but electrical properties (charge mobility) deteriorate under external movements

Engineering Contradiction:

ImprovestretchabilityVSAvoidelectrical properties

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent changes the chemical and structural parameters of the polymer material by incorporating specific structural units (Formula 1) with electron-accepting and electron-donating moieties. This structural parameter change enables the material to maintain both stretchability and high charge mobility, resolving the contradiction between flexibility and electrical performance.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates a composite polymer structure combining electron-accepting moieties (e.g., naphthyridine dione) and electron-donating moieties (e.g., selenophene, tellurophene) within the same polymer chain. This composite structure at the molecular level allows the material to simultaneously achieve mechanical flexibility and excellent electrical properties.

Inventive Principle:

Principle #40Composite materials

2Reliability

If polymer structure is optimized for high charge mobility, then electrical properties are improved, but stretchability deteriorates

Engineering Contradiction:

Improvecharge mobilityVSAvoidstretchability

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent applies local quality by creating specific regions within the polymer structure that have different functions: electron-accepting moieties provide structural stability and high charge mobility, while electron-donating moieties provide flexibility and stretchability. This local functional differentiation allows simultaneous optimization of both electrical and mechanical properties.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent optimizes the aspect ratio parameter of the structural unit to be less than or equal to 0.407, which is a critical parameter change that enables the polymer to maintain high crystallinity (for charge mobility) while preserving mechanical flexibility (for stretchability).

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS20250221294A1Polymer, organic semiconductor material, stretchable polymer thin film, and electronic device

Publication Date: 2025.07.03 SAMSUNG ELECTRONICS CO LTD

AI summary

Disclosed are a polymer including a structural unit represented by Chemical Formula 1, an organic semiconductor material, and a stretchable polymer thin film and an electronic device including the same.The definition of Chemical Formula 1 is as described in the detailed description.